<code>connectionStrategy</code> - the connection strategy to use on this paper. It can either be a function or <code>null</code>. JointJS provides a collection of <a href="#connectionStrategies">built-in connection strategies</a> in the <code>joint.connectionStrategies</code> namespace; alternatively, a <a href="#connectionStrategies.custom">custom function</a> may be provided. See the <a href="#dia.Link.geometry.connectionStrategy">link geometry connectionStrategy documentation</a> for more information.
